PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 25
·期 37
·25116-25121
·
IF 3.3
Min Kou,Young-Ho Oh,Sungyul Lee,Xianglei Kong
We present the origin of the observed differentiation of lactose and lactulose achieved by complexation with sodiated L-arginine (ArgNa+). We find that the infrared multiphoton dissociation (IRMPD) bands in 3600–3650 and >3650 cm−1 regimes for gas phase lactose and lactulose, respectively, vanish when forming host–guest complexes with ArgNa+. We interpret these differences in the IRMPD spectra by scrutinizing the interactions between the functional groups (guanidium, –CO2−Na+) in ArgNa+ and –OHs in lactose/lactulose. Our calculated structures and infrared spectra of lactose/ArgNa+ and lactulose/ArgNa+ host–guest pairs indicate that the functional groups interact with the low- and high-frequency –OH stretch modes of lactose and lactulose, respectively, in the 3600–3720 cm−1 window.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2023
·
IF 1.6
Sanbao Dong,Jiabao Fan,Hongmiao Lv,Taotao Qiang,Yue Ji,Weiwei Han
The blockage caused by liquid loading poses a major problem to the aged gas wells. Various categories of foaming surfactants including zwitterionic, anionic and cationic surfactants are often used for foam-based gas well deliquification. In this study, a foaming formula containing anionic (sodium lauroyl sarcosinate, LSS), cationic Gemini (C 16 AGB and C 12 AGB) and zwitterionic (C 16 APB and C 12 APB) surfactants was developed. This foaming formula was first optimized through the foaming ability and foam stability tests, and then evaluated through liquid unloading performance tests under various salinity, condensate, methanol and temperature conditions. Synergy was observed in the foaming ability and foam stability measurements when LSS, C 16 AGB, C 12 AGB, C 16 APB and C 12 APB were combined at a molar ratio of 5:4:1:4:1. The foaming formula exhibited excellent liquid unloading performance at high salinity (up to 26 × 10 4 mg/L), high condensate fraction (up to 25%) and high methanol fraction (up to 50%) conditions. The presence of 10% methanol significantly enhanced foaming efficiency (referred to as the ratio of the foam mass to the initial liquid mass) and liquid unloading efficiency of the foaming formula at 20–90°C. Furthermore, the surface tension measurements and the foam morphological investigation were carried out to reveal the observed synergy.
✓ 已验证
DOI
高影响因子
Communications Chemistry
·
2023
·Vol. 6
·期 1
·1-10
·
IF 5.9
Li Pan,Gemayel Rachel,Li Xue,Liu Jiangping,Tang Mingjin,Wang Xinming,Yang Yan,Al-Abadleh Hind A.,Gligorovski Sasho
Heterogeneous reaction of gas phase NO 2 with atmospheric humic-like substances (HULIS) is potentially an important source of volatile organic compounds (VOCs) including nitrogen (N)-containing compounds, a class of brown carbon of emerging importance. However, the role of ubiquitous water-soluble aerosol components in this multiphase chemistry, namely nitrate and iron ions, remains largely unexplored. Here, we used secondary electrospray ionization ultrahigh-resolution mass spectrometry for real-time measurements of VOCs formed during the heterogeneous reaction of gas phase NO 2 with a solution containing gallic acid (GA) as a proxy of HULIS at pH 5 relevant for moderately acidic aerosol particles. Results showed that the number of detected N-containing organic compounds largely increased from 4 during the NO 2 reaction with GA in the absence of nitrate and iron ions to 55 in the presence of nitrate and iron ions. The N-containing compounds have reduced nitrogen functional groups, namely amines, imines and imides. These results suggest that the number of N-containing compounds is significantly higher in deliquescent aerosol particles due to the influence of relatively higher ionic strength from nitrate ions and complexation/redox reactivity of iron cations compared to that in the dilute aqueous phase representative of cloud, fog, and rain water.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Wenkai Zhu,Meiling Chen,Jieun Jang,Minsu Han,Yeonggyun Moon,Junghwan Kim,Jungmok You,Song Li,Teahoon Park,Jeonghun Kim
Nanocellulose-based aerogels have been considered as one of the ideal candidates for CO 2 capture in practical applications owing to their lightweight and porous properties. Additionally, various adsorbents with amine groups have been widely used as effective CO 2 capture and storage strategies. Herein, amino-functionalized aerogels were prepared by sol-gel and freeze-drying methods using two typical nanocelluloses (cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs)) as substrates. In addition, the reaction parameters for grafting and amino functionalization were optimized. The CNC and CNF aerogels could be easily modified by the hydrothermal growth of the amino group, and they exhibited attractive properties in terms of CO 2 adsorption, recyclability, thermal stability , hydrophobicity , and CO 2 /CH 4 mixture separation. The amino-functionalized CNF aerogel exhibited superior performance to the CNC aerogel, which was attributed to the increased cross-linking binding sites for hydrogen bonding in the CNF aerogel. The results of this study indicated that amino-functionalized nanocellulose aerogels can be considered a promising biodegradable, sustainable, and environmentally friendly material for CO 2 capture and removal of CO 2 from CH 4 .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Zhidong Jin,Jinbo Zhao,Lin Liu,Fei Liu,Zhou Wang,Fenglong Wang,Jiurong Liu,Yue Mou,Lili Wu,Xiao Wu
Water vapor greatly interferes with gas sensing characteristics of metal oxide semiconductors (MOS). Consequently, for the first time, Nd 2 O 3 -loaded In 2 O 3 porous nanorods were synthesized which exhibited excellent H 2 S sensitivity along with prominent humidity-independent characteristics, whereas pristine In 2 O 3 without Nd 2 O 3 showed deteriorated H 2 S sensing features under increasing ambient humid conditions in a wide operating temperature range. The mechanism of humidity-independent H 2 S sensing properties was researched via X-ray photoelectrons spectroscopy (XPS), in-situ Fourier Transform infrared spectroscopy (in-situ DRIFTS) and the corresponding gas sensing measurements, which is in close relations with the inhibition of chemisorbed oxygen and scavenging hydroxyl groups on In 2 O 3 surface induced by surficial Nd 2 O 3 component. This strategy poses a cutting-edge comprehending of temperature-dependent humidity-interference on MOS, paves a novel route for fabricating H 2 S sensors with exceptional sensitivity, selectivity and anti-humidity properties, which will be quite conducive for real-time exhaled breath analyses in disease diagnosis.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Ruimin Zhu,Lucy Wang,Huayu Zhang,Chunjie Liu,Zhengbao Wang
ZIF-8 membranes have attracted extensive research attention due to their ease of synthesis, stable properties, and wide applicability. Compared to expensive inorganic supports, organic polymer supports are more flexible and inexpensive. However, addressing the issue of weak adhesion between the surface of the organic support and the ZIF-8 membrane layer poses a significant challenge. In this study, we present a strategy for preparation of ZIF-8 membrane by the fabrication of an asymmetric dual-layer polymeric hollow fiber support using polyvinylidene fluoride (PVDF) as the material. The outer layer of the support is composed of PVDF embedded with ZIF-8 seeds, while the inner layer consists of pure PVDF. This approach addresses the weak adhesion between the support and the ZIF-8 membrane layer formed through a one-step solvothermal crystallization process. The effects of ZIF-8 seed size, content, and crystallization conditions on the membrane structure and performance are investigated. Under the synergistic molecular sieving effects of ZIF-8 continuous membrane layer and ZIF-8 crystals within the outer layer of the support, larger gas molecules are difficult to penetrate the membrane layer, making the resulting membrane highly selective for the gas separation. Under the optimal fabrication conditions, the H 2 permeability of the ZIF-8 membrane is determined to be 1.52 ± 0.1 × 10 −7 mol·Pa −1 ·s −1 ·m −2 , with a H 2 /N 2 ideal separation selectivity of 69.5 ± 4. This method demonstrates simplicity and high reproducibility for preparation of ZIF-8 membranes on dual-layer hollow fibers, and it is expected to be extended to the growth and fabrication of other MOF membranes.
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Xiaoxing Wang,Xinhong Cai,Xiaoqin Zhang,Jinggang Wang,Jin Zhu
A series of bio-based poly(ethylene-co-propylene furandicarboxylate) (PEPF) copolyesters with different compositions were synthesized from dimethyl-2,5-furandicarboxylate, ethylene glycol and 1,3-propanediol by transesterification and melting polycondensation. Their chemical structure, composition and sequence distribution were confirmed by 1 H NMR and 13 C NMR. The results of GPC showed that the obtained copolyesters had a high number average molecular weight between 25000 g/mol and 30900 g/mol. The thermal properties characterized by DSC showed that the T g increased with the mole fraction of EF from 64.4℃ for PEPF-23 to 83.2℃ for PEPF-84 as well as the samples displayed a high Young's modulus between 2800 and 3360 MPa and tensile strength between 56 and 89 MPa. Furthermore, the PEPF copolyesters exhibited excellent CO 2 , O 2 and H 2 O barrier properties compared with poly(ethylene terephthalate) with the BIFp of 8.7–10 times, 3.7–4.4 times and 1.5–1.6 times, respectively. The transparency of PEPFs was up to 89% by cutoff at 700 nm and had better solvent resistance. This work builds a bridge between poly(ethylene 2,5-furandicarboxylate) and poly(propylene 2,5-furandicarboxylate) and PEPFs owned excellent thermo-mechanical and gas barrier properties could be used in food packaging fields.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Bin Huang,Kuan Li,Qi-Yu Ma,Tuan-Xiu Xiang,Rui-Xue Liang,Ya-Nan Gong,Bang-Jin Wang,Jun-Hui Zhang,Sheng-Ming Xie,Li-Ming Yuan
Metallacycles are a novel class of supramolecular materials with circular structures, internal cavities, and abundant host–guest chemical properties that have exhibited good application prospects in many fields. However, to the best of our knowledge, no research on the use of metallacycles as stationary phases for gas chromatographic (GC) separations has been published yet. In this work, we report for the first time the use of a homochiral metallacycle, [ZnCl2L]2, as a stationary phase for GC separations. [ZnCl2L]2 was synthesized by reaction of (S)-(1-isonicotinoylpyrrolidin-2-yl)methyl-isonicotinate (L) with ZnCl2 via coordination-driven self-assembly. The [ZnCl2L]2-coated column displayed an excellent separation performance not only of organic isomers but also of racemic compounds. Sixteen racemates (including alcohols, esters, amino acid derivatives, ethers, organic acids, and epoxides) and 21 isomeric compounds (including positional, structural, and cis/trans-isomers) were well separated on the [ZnCl2L]2-coated column. Impressively, some racemates were resolved with high resolution values (Rs), including 1,2-butanediol diacetate (Rs = 25.86), ethyl 3-hydroxybutyrate (Rs = 20.97), 1,3-butanediol diacetate (Rs = 18.09), and threonine derivative (Rs = 18.61). Compared with the commercial β-DEX 120 column for separation of the tested racemates, the [ZnCl2L]2-coated column exhibited good enantioseparation complementarity, enabling separation of some racemates that could not be separated, or were not well resolved, by the β-DEX 120 column. In addition, many organic mixtures, such as n-alkanes, alkylbenzenes, n-alcohols, and a Grob test mixture, were also well separated on the [ZnCl2L]2-coated column. The column also has good reproducibility and thermal stability on separation. This work not only reveals the great potential of metallacycles for GC separations but also opens up a new application of metallacycles in separation science.
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yue Sun,Sicheng Yuan,Ziheng Bai,Bin Liang,Dengyu Fu,Haodong Hu,Luchao Pei,Ruitao Wang,Yanji Zhu,Huaiyuan Wang
In the process of carbon capture, utilization and storage (CCUS), carbon dioxide is in long-term contact with metal pipelines and devices. Therefore, in the CCUS environment the corrosion of carbon dioxide to metals limits the service life. Herein we have explored the failure of epoxy (EP) coating in the CO 2 corrosion environment. Based on this, a unique g-C 3 N 4 -ESO-EP anti-corrosion coating suitable for CCUS conditions was prepared by using graphene-C 3 N 4 (g-C 3 N 4 ) nanosheet and epoxy silane oligomer (ESO) one-step method. The semiconductor g-C 3 N 4 prepared by the secondary thermal stripping method provides plentiful CO 2 adsorption sites and prevents the diffusion of corrosive ions (gathered state CO 2 , CO 3 2− , HCO 3 − , H + ) in the EP coating. The CO 2 gas permeability of g-C 3 N 4 -ESO-EP film (with thickness of 100 μm) is approximately 45.94% lower than that of EP film. After immersion in 1.0 M acid corrosion environment, the protection efficiency of g-C 3 N 4 -ESO-EP coating is 99.99%. After adding ESO, the “bridging effect” formed at the interface reduces the interface defects between the resin and the nano-sheet, and synergistically enhances the adhesion between the coating and the substrate. The g-C 3 N 4 -ESO-EP coating has passed the test of severe simulated CCUS corrosion environment (4 days in 3.0 MPa CO 2 and 3.5 wt% NaCl solution). The |Z| 0.01Hz value of g-C 3 N 4 -ESO-EP coating after immersion in 3.5 wt% NaCl solution for 120 days maintained 1.73 × 1011 O cm 2 , indicating the coating has long-term corrosion resistance. This work provides a new and simple method to improve the CO 2 resistance of EP coating and reveals the importance of functional composite coating for metal protection in CCUS process.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jianchun Jiang,Qingmeng Pi,Jiahang Zhou,Yixuan Du,Yunbo Li
Ammonia is increasingly deemed a significant, green sustainable fuel which requires a large number of detection devices. In this study, ultrathin AuNWs/PEDOT:PSS Janus films had been prepared with ultrathin AuNWs film treated with H 2 S which could integrate with PEDOT:PSS film closely. The resulting transparent and flexible Janus film sensor showed the good response and selectivity performance to ammonia gas. Moreover, the sensitivity of Janus film devices to ammonia was greatly improved and the conductivity of the Janus films was kept well with increasing thermal annealing temperature. The limit detection for NH 3 was 500 ppb concentration and the improvement mechanism of the sensing performance was attributed to the increased surface area of conductive polymer . This method provides a universal platform to integrate different materials into Janus films and prepare next-generation flexible detection sensors.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Gang Li,Shuanshi Fan,Zijian Zhang,Yanhong Wang,Xuemei Lang,Jing Li
SAPO-34 zeolite membranes were activated by ultraviolet (UV) radiation at low temperatures to reduce grain boundary defects. The successful detemplation of SAPO-34 zeolite powders using UV radiation was confirmed by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and nitrogen adsorption-desorption. The irradiance exerted a significant impact on the quality of UV-detemplated SAPO-34 membranes. Under optimal UV detemplation conditions, SAPO-34 membranes showed a moderate H 2 permeance of ∼10 −7 mol Pa −1 m −2 s −1 , with a H 2 /i-C 4 H 10 permselectivity over 75 under room temperature. The membranes showed an exceptionally low CO 2 permeance in comparison with N 2 and CH 4 despite the smaller molecular size of CO 2 , resulting in an unprecedentedly high H 2 /CO 2 permselectivity over 50, which was ascribed mainly to the intense interaction between the CO 2 molecules and confined organic structure directing agent (OSDA) residue in membrane channels. The temperature dependence of singe-gas permeance through SAPO-34 zeolite membranes showed that gases, including He, H 2 , CO 2 , CH 4 , C 2 H 6 , C 3 H 8 , and i-C 4 H 10 , markedly increased as the temperature increased, indicating an activated diffusion mechanism. The activation energies for H 2 permeation through the SAPO-34 membranes were 17–23 kJ mol −1 , which were reasonable based on the correlation between the activation energy for H 2 permeation and the average pore size for reported membranes by assuming minimal grain boundary defects in the UV-detemplated SAPO-34 membranes.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Gang Chen,Yun Guo,Xuechun Yang,Guohao Li,Zhanpeng Yang,Jingyu Huang,Lingli Cheng,Zheng Jiao
Herein, in order to efficiently enhance the sensing properties based on zinc oxide (ZnO) sensors toward n-butanol, a series of MOF ZIF-8 (zeolite imidazolate framework-8)-derived Tourmaline@ZnO core–shell nanostructures were prepared with a facile solution mixing method and an after-treatment calcination process, and the gas sensing performances were systematically characterized. The results exhibited that the paucity of tourmaline introduction could significantly improve the gas sensitivity for n-butanol, simultaneously increasing the gas selectivity and reducing the response–recovery times. In particular, the sensor based on 5 wt % Tourmaline@ZnO nanocomposites achieved a superior response value, reaching up to 294.4 for 100 ppm n-butanol at 320 °C. Through the integrated testing and analyses of BET, XPS, PL, and UV, it has been confirmed that the introduction of tourmaline can not only enlarge the specific surface area and enrich the surface defects of the ZnO matrix, but its unique spontaneous polarization electric field can also reduce the recombination rate of electron–hole pair efficiency, promoting the efficiency of electron transport and accelerating the gas sensing process ultimately. The enhancement mechanism of the nanostructured Tourmaline@ZnO core–shell gas sensing material was also elucidated from the perspective of the energy band theory at length.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）